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Message-ID: <53883AB8.6030205@huawei.com>
Date: Fri, 30 May 2014 16:00:56 +0800
From: Ding Tianhong <dingtianhong@...wei.com>
To: Patrick McHardy <kaber@...sh.net>,
"David S. Miller" <davem@...emloft.net>,
Netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next] macvlan: add netpoll support
Add netpoll support to macvlan devices. Based on the netpoll support in the 802.1q vlan code.
Tested and macvlan could work well with netconsole.
Signed-off-by: Ding Tianhong <dingtianhong@...wei.com>
---
drivers/net/macvlan.c | 66 +++++++++++++++++++++++++++++++++++++++++++++-
include/linux/if_macvlan.h | 3 +++
2 files changed, 68 insertions(+), 1 deletion(-)
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 3e24770..45ebb91 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -33,6 +33,7 @@
#include <linux/workqueue.h>
#include <net/rtnetlink.h>
#include <net/xfrm.h>
+#include <linux/netpoll.h>
#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
@@ -357,12 +358,26 @@ xmit_world:
return dev_queue_xmit(skb);
}
+static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
+{
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ if (vlan->netpoll)
+ netpoll_send_skb(vlan->netpoll, skb);
+#else
+ BUG();
+#endif
+ return NETDEV_TX_OK;
+}
+
static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
unsigned int len = skb->len;
int ret;
- const struct macvlan_dev *vlan = netdev_priv(dev);
+ struct macvlan_dev *vlan = netdev_priv(dev);
+
+ if (unlikely(netpoll_tx_running(dev)))
+ return macvlan_netpoll_send_skb(vlan, skb);
if (vlan->fwd_priv) {
skb->dev = vlan->lowerdev;
@@ -786,6 +801,50 @@ static netdev_features_t macvlan_fix_features(struct net_device *dev,
return features;
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void macvlan_dev_poll_controller(struct net_device *dev)
+{
+ return;
+}
+
+static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+ struct net_device *real_dev = vlan->lowerdev;
+ struct netpoll *netpoll;
+ int err = 0;
+
+ netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!netpoll)
+ goto out;
+
+ err = __netpoll_setup(netpoll, real_dev);
+ if (err) {
+ kfree(netpoll);
+ goto out;
+ }
+
+ vlan->netpoll = netpoll;
+
+out:
+ return err;
+}
+
+static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
+{
+ struct macvlan_dev *vlan = netdev_priv(dev);
+ struct netpoll *netpoll = vlan->netpoll;
+
+ if (!netpoll)
+ return;
+
+ vlan->netpoll = NULL;
+
+ __netpoll_free_async(netpoll);
+}
+#endif /* CONFIG_NET_POLL_CONTROLLER */
+
static const struct ethtool_ops macvlan_ethtool_ops = {
.get_link = ethtool_op_get_link,
.get_settings = macvlan_ethtool_get_settings,
@@ -811,6 +870,11 @@ static const struct net_device_ops macvlan_netdev_ops = {
.ndo_fdb_del = macvlan_fdb_del,
.ndo_fdb_dump = ndo_dflt_fdb_dump,
.ndo_get_lock_subclass = macvlan_get_nest_level,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = macvlan_dev_poll_controller,
+ .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
+ .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
+#endif
};
void macvlan_common_setup(struct net_device *dev)
diff --git a/include/linux/if_macvlan.h b/include/linux/if_macvlan.h
index a9a53b1..6b2c7cf 100644
--- a/include/linux/if_macvlan.h
+++ b/include/linux/if_macvlan.h
@@ -57,6 +57,9 @@ struct macvlan_dev {
netdev_features_t tap_features;
int minor;
int nest_level;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct netpoll *netpoll;
+#endif
};
static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
--
1.8.0
--
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